[Why doesn't timeline start right with page loaded?]

I watched A Simple Parallax Effect from I Hate Tomato, https://ihatetomatoes.net/module-1/s101-a-simple-parallax-effect-1639/, he uses  Scrollmagic with GSAP timeline, but the timeline doesn't start right away when page loaded but until scrolling to a specific point. I want to know what is the mechanism to prevent the timeline starting right away. 

[Can I use MorphSVGPlugin with CDN?]

I have paid for the Shockingly Green. Can I use MorphSVGPlugin with CDN? Or I must download the plugin file to use it?